Blocked when i want to open my library with movies


I have a problem when i want to open the hole library with my movies (>1500 movies), he blocks.
When I open the library with filter on year or something it opens after a time (not realy smooth and fast),if the list is not to long otherwise he blocks too.

Has someone else that to? and what can be the solution?

I have a raspberry B+ 1st version. And i have installed the alpha 4 version.

When comes the stable version online?